//
// (C) Copyright 2009 Irantha Suwandarathna (irantha@gmail.com)
// All rights reserved.
//

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use _in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions _in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer _in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


using System;
using System.IO;
using System.Text;
using EffiProz.Core.Lib;


namespace EffiProz.Core
{


    /**
     * Simple log for recording abnormal events _in persistence<p>
     * Log levels, LOG_NONE, LOG_ERROR, and LOG_NORMAL are currently supported.<p>
     * LOG_ERROR corresponds to property value 1 and logs main database events plus
     * any major errors encountered _in operation.
     * LOG_NORMAL corresponds to property value 2 and logs additional normal events
     * and minor errors.
     *
     * @author fredt@users
     * @version 1.8.0
     * @since 1.8.0
     */
    public class SimpleLog
    {

        public const int LOG_NONE = 0;
        public const int LOG_ERROR = 1;
        public const int LOG_NORMAL = 2;
        private TextWriter writer;
        private int level;

        private bool isSystem;
        private String filePath;

        public SimpleLog(String path, int level)
        {

            this.isSystem = path == null;
            this.filePath = path;

            setLevel(level);
        }
        private void setupWriter()
        {

            if (level == LOG_NONE)
            {
                close();

                return;
            }

            if (writer == null)
            {
                if (isSystem)
                {
                    writer = System.Console.Out;
                }
                else
                {
                    FileInfo file = new FileInfo(filePath);
                    setupLog(file);
                }
            }
        }

        private void setupLog(FileInfo file)
        {

            try
            {
                FileUtil.GetDefaultInstance().makeParentDirectories(file);
                writer = file.CreateText();
            }
            catch (Exception )
            {
                isSystem = true;
                writer = System.Console.Out;
            }
        }

        public void setLevel(int level)
        {

            this.level = level;
            setupWriter();
        }

        public int getLevel()
        {
            return level;
        }

        public TextWriter getPrintWriter()
        {
            return writer;
        }

        public void sendLine(int atLevel, string message)
        {
            lock (this)
            {
                if (level >= atLevel)
                {
                    writer.WriteLine(DateTime.Now.ToString() + " " + message);
                }
            }
        }

        public void logContext(int atLevel, string message)
        {
            lock (this)
            {
                if (level < atLevel)
                {
                    return;
                }

                string info = DateTime.Now.ToString();



                writer.WriteLine(info + " " + message);
            }
        }

        public void logContext(Exception t, string message)
        {
            lock (this)
            {
                if (level == LOG_NONE)
                {
                    return;
                }

                string info = DateTime.Now.ToString();


                if (message == null)
                {
                    message = "";
                }

                writer.WriteLine(info + " " + t.ToString() + " " + message);
            }
        }

        public void flush()
        {

            if (writer != null)
            {
                writer.Flush();
            }
        }

        public void close()
        {

            if (writer != null && !isSystem)
            {
                writer.Close();
            }
            writer = null;
        }
    }
}
